Broadcast workspace: End stream calls DELETE /api/streams/:id, the route that ends a stream (owner or staff). It posted to /api/streams/:id/end, which no route serves, so the button answered 'Failed to end stream' with a 404. Found by the N-1 recorder (WS-P task 11).

ddiff --git a/public/js/broadcast-workspace.js b/public/js/broadcast-workspace.js
iindex 435f220f..b8e40389 100644
---- a/public/js/broadcast-workspace.js
++++ b/public/js/broadcast-workspace.js
@@@ -1325,7 +1325,7 @@ async function _wsEndStream() {
      }
  
      try {
--        await api(`/streams/${liveSessionId}/end`, { method: 'POST' });
++        await api(`/streams/${liveSessionId}`, { method: 'DELETE' });   // DELETE /api/streams/:id ends it (owner or staff)
          if (typeof stopBroadcast === 'function') stopBroadcast();
          toast('Stream ended', 'success');
          updateWorkspaceLiveStatus();